New Booking projects for Q4 2026

We build mobile apps and web platforms that actually ship.

REACT CODER is a senior-only product engineering studio. We take teams from a rough idea to a live, scalable product — with a fixed scope, a real date, and code you would be happy to inherit.

Engineering team working together at a laptop
SwiftKotlinReact NativeFlutterTypeScriptReactNext.jsNode.jsGoPythonGraphQLPostgreSQLRedisKafkaAWSGoogle CloudAzureDockerKubernetesTerraformFigmaPlaywrightSwiftKotlinReact NativeFlutterTypeScriptReactNext.jsNode.jsGoPythonGraphQLPostgreSQLRedisKafkaAWSGoogle CloudAzureDockerKubernetesTerraformFigmaPlaywright
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Products shipped
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Years building software
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Engineers & designers
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Clients who come back
What we do

One team for the whole product lifecycle

Strategy, design, engineering and operations under one roof — so nothing gets lost in a handover between three vendors.

Mobile app development

Native iOS and Android, or a single cross-platform codebase in React Native or Flutter. Built for offline, low-end devices and app store review on the first attempt.

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Web & platform engineering

Marketing sites, customer portals, dashboards and multi-tenant SaaS. Fast, accessible, and typed end to end.

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Product design (UI/UX)

Research, flows, wireframes and a production-ready design system. We test prototypes with real users before we write code.

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Cloud & DevOps

AWS, GCP and Azure infrastructure as code, CI/CD pipelines, observability and cost tuning. Deploys become boring.

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AI & data features

Retrieval, recommendations, document understanding and LLM features wired into your product with sane evaluation and guardrails.

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QA & automation

Automated test suites, real-device testing, accessibility audits and load testing so launch week is uneventful.

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Why teams pick us

Senior engineers. Fixed scope. No surprises.

Most projects fail on communication, not code. We run a small number of engagements at a time so the people who scoped your project are the people who build it.

  • Senior-only teams — every engineer on your project has shipped production software for at least five years
  • Fixed scope and price — you approve a written scope and estimate before a line of code is written
  • You own everything — source code, infrastructure, designs and documentation are yours from day one
  • Weekly demos — working software every sprint, deployed where you can open it yourself
  • Your timezone — at least four hours of daily overlap with your working day, guaranteed
release-checklist.ts
// Nothing ships until every one of these is green.
export const gate = {
  tests:        'unit + integration + e2e',
  coverage:     85,           // minimum %
  a11y:         'WCAG 2.2 AA',
  perf:         { cold_start: 1.8, lcp: 2.5 },
  security:     'SAST + dependency audit',
  rollback:     true,
  monitoring:   ['crash', 'latency', 'funnel'],
};

export async function canRelease(build) {
  const checks = await runAll(gate, build);
  return checks.every(c => c.passed);
}
How we work

A process built to remove risk early

The expensive mistakes happen in week one, not week twenty. So we front-load the thinking.

01

Discovery & product strategy

We start with the problem, not the backlog. Stakeholder interviews, user research, competitive teardown and a technical feasibility pass. You leave with a scoped roadmap and a fixed estimate.

Typical duration · 1–2 weeks
02

Experience design

Information architecture, user flows, wireframes, then a clickable high-fidelity prototype in your brand. We test it with real users before a single component is built.

Typical duration · 2–4 weeks
03

Architecture & setup

Data model, API contracts, environment strategy, CI/CD, observability and security baseline. Decisions get written down in an architecture record you keep.

Typical duration · 1–2 weeks
04

Build in two-week sprints

Working software at the end of every sprint, deployed to a staging build you can open on your own phone. Demo, feedback, adjust — no six-week silences.

Typical duration · Ongoing
Selected work

Products in the hands of real users

A few of the builds we can talk about publicly.

Hands using a mobile banking app to transfer money
Fintech

Ledgerly — spend controls for teams

A card-and-expense app for finance teams. We rebuilt the onboarding flow and cut time-to-first-transaction from 11 minutes to under 3.

React NativeNode.jsPlaidAWS
Clinician using a mobile device for patient care
Healthcare

Corova — remote care companion

HIPAA-conscious patient app with secure messaging, scheduling and medication reminders. Offline-first so rural users are never blocked.

SwiftKotlinFHIRAzure
Forklift moving shipping containers at a freight port
SaaS

Northbeam Ops — logistics control tower

A real-time dashboard tracking 40k shipments a day. Server-driven tables and websockets keep the view under 200 ms from event to pixel.

Next.jsTypeScriptPostgresRedis
Client feedback

What it is like to work with us

They ran discovery properly instead of jumping to code, and it saved us a quarter of wasted build. The app shipped on the date they gave us in week one.

MH
Marcus HaleVP Product, Ledgerly

The handover was the best I have seen. Documented architecture, a real test suite, and two weeks of pairing with our in-house team before they stepped back.

PD
Priya DesaiCTO, Northbeam

We came in with a rough idea and left with a product strategy. They pushed back on features we did not need, which is rare for an agency.

JL
Jonas LindFounder, Cadence

Have a product in mind?

Tell us what you are building. You will get a written scope, a timeline and a fixed estimate within five business days — free, and yours to keep whether or not you hire us.